Valve



Patented Dec. 27, |898. G. B. MITCHELL.

V A L V E (Application filed Mar. 14, 1898.)

(No Model.)

IIII

MIL IIIIIMIIIINMI .IIII Il H mn UIN .- UNITED STATES PATENT ERICE.

cHARLES BRADLEY MITCHELL, or IIAYS, TEXAS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 616,796, dated December 27, 1898.

Application filed March 14,1898. Serial'll'o. 673,827. (No model.) l

To all whom t may concern.-

Be it known that I, CHARLES BRADLEY MITCHELL, a citizen of the United States, residing at Hays, in the county of Robertson and State of Texas, have invented a new and useful Valve, of which the followin gis a speciiication.

My invention relates to valves, particularly of that class knownas balanced rotary valves, and has for its object to provide a simple and compact construction and arrangement of parts for efficiently controlling the ilow of steam, compressed air, water, or other fiuid, and especially to provide such a construction as to adapt the valve-seat and valve' to be withdrawn simultaneously from the casing in which it is inclosed to expose the working parts for cleansing and repair` without detaching the valve-casing from the communieating feed-pipe. c

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claim.

In the drawings, Figure l is a side view of a valve constructed in accordance with my invention. Fig. 2 is a similar view showing the outer casing in longitudinal section. Fig. 3 is a central longitudinal section of the entire mechanism, including the valve-seat, the valve proper being partly broken away. Fig. 4 is a transverse section on the plane indicated by the line 4c 4t of Fig. 2.

Similar numerals of reference indicate corresponding parts in all the iigu res of the drawings.

l designates 4a feed-pipe adapted for connection with the cylinder of an engine or other receptacle to be supplied with a fluid, and connected with the feed-pipe is a cylindrical'casing 2, which is preferably threaded to its place upon the feed-pipe and is axially alined therewith, the bore of the casing being of larger diameter than the feed-pipe.

3 represents a tubular valve-seat of an exterior diameter which is smaller than the bore of the casing and is fitted concentrically therein, said seat being provided with a threaded enlargement 4,which is engaged with a threaded terminal portion of the casing at the opposite end from said feed-pipe, the valve-seat being provided with suitable ports 5, elongated longitudinally of the seat or parallel with the axis thereof. The valve-seat is extended'beyond the threaded boss and in axial alinement with the seat, as shown at 6, and communicating laterally with the interior of this extension is a supply-pipe 7, the valveseat extension being adapted to occupya position outside of the casing and. being fitted with a terminal cap or head 8, having a stuft'- ing-box 9, through which extends the Valvestem 10, provided with the usual operatingleverll or the equivalent thereof. The valve 12, which is of hollow tubular construction, is carried by the stem in the valve-seat proper and is'provided with lateral ports 13, adapted for registration ,withA the port-s in the valveseat and designed to be brought into registration therewith by rotary movement of the valve. Obviously by making the ports of con- -siderable length and narrow in proportion the opening or closing of the ports may be accomplished by a comparatively slight movement of the operating-lever, whereby in case of necessityvthe prompt cutting off of the flow of fluid may be attained.

It will be seen from the foregoing description that by removably mounting the valveseat in an axial position in the valve-casing and providing said seat at an intermediate point or between the valve-seat proper and its extension with an annular boss forming a cylinder-head the valve-seat may be readily displaced without dismounting the valve to expose the parts for repair; also, the removal of the cap which is iitted upon the extremity of the valve-seat extension allows the axial displacement of the Valve proper. more, it will be seen that this dismounting of the valve-seat and valve can be accomplished without the displacement of any other part of the mechanism with which the valve is used and that the construction of the valve is such as to insure a balancedmovement thereof. The inclosed portion of the valveseat or that portion which is arranged within the casing and which is in open ycommunication with the extensionr to which the inletpipe is connected may be made of any desired length to suit the required length of ports.

Various changes in the form, proportion, and the minor details of construction maybe Further- IOO resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is- In a valve mechanism, the combination of a tubular easing communicating at one end With a feed-pipe, a tubular elongated valveseat, fitted at one end concentrically Within said casing and provided at an intermediate point With an annular enlargement or head removably fitted in the opposite end of the casing from the feed-pipe, said valve-seat have ing an axially-alined tubular extension located outside the casing and having a lateral inletport and a terminal removable-cap CHARLES BRADLEY MITCHELL.

lVitnesses:

S. J MARIS, W. T. MARIS; l 

